<template>
  <div class="person">
    <h2>姓名：{{ person.name }}</h2>
    <h2>年龄：{{ person.age }}</h2>
    <h2>汽车：{{ person.car.c1 }}、{{ person.car.c2 }}</h2>
    <button @click="changeName">修改名字</button>
    <button @click="changeAge">修改年龄</button>
    <button @click="changeC1">修改第一台车</button>
    <button @click="changeC2">修改第二台车</button>
    <button @click="changeCar">修改整个车</button>
  </div>
</template>

<script setup lang="ts" name="Person">
import { reactive, watch } from "vue";

// 数据
let person = reactive({
  name: "张三",
  age: 18,
  car: {
    c1: "奔驰",
    c2: "宝马",
  },
});

// 方法
function changeName() {
  person.name += "~";
}
function changeAge() {
  person.age += 1;
}
function changeC1() {
  person.car.c1 = "奥拓";
}
function changeC2() {
  person.car.c2 = "奔奔";
}
function changeCar() {
  person.car = {
    c1: "雅迪",
    c2: "爱玛",
  };
}

// 监视:情况四:监视响应式对象中的某个属性且该属性是基本类型的要写成函数式的
watch(
  () => person.name, //使用函数返回要监视的值
  (newValue, oldValue) => {
    console.log("person.name变化了", newValue, oldValue);
  }
);
// 监视的对象属性值为对象类型,最好使用函数式+deep:true
watch(
  () => person.car, //使用函数式返回要监视的值
  (newValue, oldValue) => {
    console.log("person.car变化了", newValue, oldValue);
  },
  { deep: true } // 深度监视
);
</script>

<style scoped>
.person {
  background-color: skyblue;
  box-shadow: 0 0 10px;
  border-radius: 10px;
  padding: 20px;
}
button {
  margin: 0 5px;
}
li {
  font-size: 20px;
}
</style>
